Sixteen years ago, D.C. activists gathered signatures to let voters decide if the District should be among the first in the nation to legalize medical marijuana. Then Congress stepped in, and city officials were not even allowed to count the ballots that voters had cast.

Inside a rented house in Northwest Washington, behind a shaggy bear skin rug strung up as a makeshift curtain and amid rollaway beds set up for signature gatherers who have come from as far away as California and Colorado, there’s growing anxiety that history is about to repeat itself.

Organizers for Initiative 71, a measure that would fully legalize possession of marijuana in the District, plan to announce this week that they are closing in on 60,000 signatures — a comfortable buffer over the 22,600 needed to ensure the measure qualifies for the November ballot.

District voters support legalization by a ration of 2 to 1, polls show. The city has medical marijuana dispensaries and is taking steps to soon loosen restraints and let doctors recommend the drug for any ailment. The D.C. Council even voted in March to decriminalize possession, making it a fine of $25, instead of a year-long jail term.

This is one to watch, folks. It may well be the tipping point - combined with Oregon and Alaska.